second time this week that i wake up and my boot content is missing

i notice it because of unmenu not showing my main

 

unraid is running normal but there is no usb drive mounted any more

 

the logs show

May 15 05:26:29 p5bplus kernel: mdcmd (815): spindown 5
May 15 05:26:40 p5bplus kernel: mdcmd (816): spindown 1
May 15 05:26:51 p5bplus kernel: mdcmd (817): spindown 2
May 15 05:43:23 p5bplus kernel: usb 1-1: reset high speed USB device using ehci_hcd and address 2
May 15 05:43:38 p5bplus kernel: usb 1-1: device descriptor read/64, error -110
May 15 05:43:54 p5bplus kernel: usb 1-1: device descriptor read/64, error -110
May 15 05:43:54 p5bplus kernel: usb 1-1: reset high speed USB device using ehci_hcd and address 2
May 15 05:44:09 p5bplus kernel: usb 1-1: device descriptor read/64, error -110
May 15 05:44:24 p5bplus kernel: usb 1-1: device descriptor read/64, error -110
May 15 05:44:24 p5bplus kernel: usb 1-1: reset high speed USB device using ehci_hcd and address 2
May 15 05:44:35 p5bplus kernel: usb 1-1: device not accepting address 2, error -110
May 15 05:44:35 p5bplus kernel: usb 1-1: reset high speed USB device using ehci_hcd and address 2
May 15 05:44:45 p5bplus kernel: usb 1-1: device not accepting address 2, error -110
May 15 05:44:45 p5bplus kernel: usb 1-1: USB disconnect, address 2
May 15 05:44:45 p5bplus kernel: sd 12:0:0:0: Device offlined - not ready after error recovery
May 15 05:44:45 p5bplus kernel: sd 12:0:0:0: [sda] Unhandled error code
May 15 05:44:45 p5bplus kernel: sd 12:0:0:0: [sda]  Result: hostbyte=0x05 driverbyte=0x00
May 15 05:44:45 p5bplus kernel: sd 12:0:0:0: [sda] CDB: cdb[0]=0x2a: 2a 00 00 0a 5b 67 00 00 01 00
May 15 05:44:45 p5bplus kernel: end_request: I/O error, dev sda, sector 678759
May 15 05:44:45 p5bplus kernel: sd 12:0:0:0: [sda] Unhandled error code
May 15 05:44:45 p5bplus kernel: sd 12:0:0:0: [sda]  Result: hostbyte=0x01 driverbyte=0x00
May 15 05:44:45 p5bplus kernel: sd 12:0:0:0: [sda] CDB: cdb[0]=0x2a: 2a 00 00 00 00 40 00 00 01 00
May 15 05:44:45 p5bplus kernel: end_request: I/O error, dev sda, sector 64
May 15 05:44:45 p5bplus kernel: Buffer I/O error on device sda1, logical block 1
May 15 05:44:45 p5bplus kernel: lost page write due to I/O error on sda1
May 15 05:44:45 p5bplus kernel: FAT: FAT read failed (blocknr 5040)
May 15 05:44:45 p5bplus kernel: FAT: FAT read failed (blocknr 5040)
May 15 05:44:45 p5bplus kernel: FAT: unable to read inode block for updating (i_pos 2394889)
May 15 05:44:46 p5bplus kernel: usb 1-1: new high speed USB device using ehci_hcd and address 3
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149680) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149681) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149682) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149683) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149684) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149685) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149686) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149687) failed
May 15 05:44:46 p5bplus kernel: FAT: Directory bread(block 149680) failed 

 

i can remount the usb stick after einserting and checking name with dmesg

but it goes weird again with the FAT read errors

put the drive on my windows machine and run scandisk with no errors

put the drive back in my unraid do a clean shutdown

restart machine and all is well again

 

just wondering what can cause this ?

do i need to ask for a new license for a new key ?

Try running memtest to test out your RAM.  Run it for at least 12 hours.  Your array will have to be down the whole time.  Bad RAM can cause flash drive errors.